Here's what I use:

http://www.lowes.com/pd_213197-39963-D00110101_4294859135+5003695_4294937087_?productId=1059839&Ns=p_product_prd_lis_ord_nbr|0||p_product _quantity_sold|1&pl=1&currentURL=%2Fpl_Hardware%2BLubricants_4294859135%2B5003695_4294937087_%3FNs%3 Dp_product_prd_lis_ord_nbr|0||p_product_quantity_sold|1&facetInfo=$5%20-%20$10

I the link doesn't work it's "DuPont Teflon Multi-Use Dry, Wax Lubricant. $5 for an 11oz can at Lowes or just about any hardware store.